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Finding the Fourth Proportional to 553,707.66, 764,128.44 and 308,707.50

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Solution

The fourth proportional to 553,707.66, 764,128.44 and 308,707.50 is: 426,022.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,707.66 : 764,128.44 = 308,707.50 : x
  2. Step 2: Convert to fraction form
    553,707.66/764,128.44 = 308,707.50/x
  3. Step 3: Cross multiply
    553,707.66x = 764,128.44 × 308,707.50
  4. Step 4: Simplify right side
    553,707.66x = 235,892,180,391.30
  5. Step 5: Solve for x
    x = 235,892,180,391.30/553,707.66
  6. Step 6: Final answer
    x = 426,022.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.